moveSelectedNodes method

Implementation

void moveSelectedNodes(Offset delta) {
  final nodeIds = _selectedNodeIds.toList();
  if (nodeIds.isEmpty) return;

  // Capture previous positions for events
  final previousPositions = <String, Offset>{};
  for (final nodeId in nodeIds) {
    final node = _nodes[nodeId];
    if (node != null) {
      previousPositions[nodeId] = node.position.value;
    }
  }

  runInAction(() {
    for (final nodeId in nodeIds) {
      final node = _nodes[nodeId];
      if (node != null) {
        final newPosition = node.position.value + delta;
        node.position.value = newPosition;
        // Update visual position with snapping
        node.setVisualPosition(_config.snapToGridIfEnabled(newPosition));
      }
    }
  });
  internalMarkNodesDirty(nodeIds);

  // Emit extension events for each moved node
  for (final nodeId in nodeIds) {
    final node = _nodes[nodeId];
    final previousPosition = previousPositions[nodeId];
    if (node != null && previousPosition != null) {
      _emitEvent(NodeMoved<T>(node, previousPosition));
    }
  }
}